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undergraduate thesis
Utjecaj parametara na preživljavanje bakterije Listeria monocytogenes
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2014. urn:nbn:hr:159:952790
Gres, Vitka
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Biochemical Engineering
Laboratory for General Microbiology and Food Microbiology

Institutional repository: Repository of the Faculty of Food Technology and Biotechnology

Cite this document

Gres, V. (2014). Utjecaj parametara na preživljavanje bakterije Listeria monocytogenes (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:952790

Gres, Vitka. "Utjecaj parametara na preživljavanje bakterije Listeria monocytogenes." Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2014. https://urn.nsk.hr/urn:nbn:hr:159:952790

Gres, Vitka. "Utjecaj parametara na preživljavanje bakterije Listeria monocytogenes." Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2014. https://urn.nsk.hr/urn:nbn:hr:159:952790

Gres, V. (2014). 'Utjecaj parametara na preživljavanje bakterije Listeria monocytogenes', Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 18 February 2025, https://urn.nsk.hr/urn:nbn:hr:159:952790

Gres V. Utjecaj parametara na preživljavanje bakterije Listeria monocytogenes [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2014 [cited 2025 February 18] Available at: https://urn.nsk.hr/urn:nbn:hr:159:952790

V. Gres, "Utjecaj parametara na preživljavanje bakterije Listeria monocytogenes", Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2014. Available at: https://urn.nsk.hr/urn:nbn:hr:159:952790

Metadata
TitleUtjecaj parametara na preživljavanje bakterije Listeria monocytogenes
Title (english)Influence of environment parameters on the survival of the Listeria monocytogenes bacterium
AuthorVitka Gres
MentorKsenija Markov (mentor)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
(Department of Biochemical Engineering)
(Laboratory for General Microbiology and Food Microbiology)
Zagreb
Defense date and country2014-09-11, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Biotechnology
Abstract
Cilj ovog rada je bio ustvrditi preživljavanje bakterije Listeria monocytogenes u hranjivom bujonu i mlijeku pri različitim temperaturnim uvjetima tijekom različitog vremenskog perioda. Listeria monocytogenes ima veliku toleranciju na ekstremne uvjete okoliša, pa tako može preživjeti uz raspon pH od 4,3 do 10 i na temperaturama od <1 °C do 45 °C. Rezultati istraživanja pokazali su da bakterija L. monocytogenes dobro preživljava pri temperaturi od 4°C, oko 62% stanica preživjelo je temperaturni tretman smrzavanjem na -20°C tijekom 21 dan, dok zagrijavanje uzoraka na 80°C/10 min smanjuje broj živih stanica za 4-5 log jedinica. Kombinacijom temperatura, zagrijavanje na 80°C/10 min, a zatim pohranjivanje uzoraka na -20°C može se značajno smanjiti pa čak i potpuno uništiti L. monocytogenes.
Abstract (english)
This thesis researches the Listeria monocytogenes bacterium and tries to establish it’s survival parameter at different temperature conditions in different time periods in different mediums (broth and milk). It has great tolerance for extreme environmental conditions, and it can survive in pH range between 4.3 and 10 and temperatures from 1 °C to 45 °C. Results show that the bacteria has a good survival rate at 4°C, about a 62% survival rate after a temperature treatment which involved freezing to -20°C during 21 days, while heating the sample to 80°C in a time period of 10 minutes reduces the cell count for 4-5 log units. Combinig the heating and freezing procedure can greatly reduce and even destroy L. monocytogenes.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:952790
Study programmeTitle: Biotechnology
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2017-04-26 11:43:03